Nonreturn valve



' March 21, 1933. c, F, OAKLEY NONRETURN VALVE 2 Sheets-Sheet l Filed Feb. 25, 1931 Fig.1.

lNVf/YTOR ATTOR/YEY March 21,- 1933. c {OAKLEY 1,902,577.

NONRETURN VALVE Filed Feb. 25, I931 .2 Sheets-Sheet 2 Fig.7.

Tug 10 5 l -11 l l 17 BY Z Patented Mar. 21, 1933 UNITED STATES PATENT EDwAED CHARLES FREDERICK OAKLEY, E NORIBURY, mid LAND. 1 I

NONRETURN VALVE 19 11161 1011 filed February 25, 1931, Serial 1 518,160, and in Great Britain February 38,1930.

This invention relates to non-return valves andin particularto valves for use in connection with petrol pumps although they may be used for various other purposes, and it has for its object a construction which will prevent any dirt or foreign matter which may be suspended in or be carried by the liquid, from settling in close proximity to or between the valve and its seating, thereby preventing the proper closing of the valve.

To attain this end the. valve is formed so that the fluid passing therethrough rotates saidvalve, and when'pumping has ceased, the continued rotation of the valve sets up a centrifugal action of the fluid thereby throwing any foreign matter that may be 0on tainedin said fluid away from the valve seat, said foreign; matter falling into an annular chamber provided below the valve and its seating. y 7 V v f In the accompanying drawings which illustrate this invention I Figure 1 is a sectional elevation of one embodiment of the invention; 1 Figure 2 is a plan thereof;

Figure3 is an underneathplan thereof;

Z Figure flis a similar view to Figure 1, of part of a valve, illustrating a modification;

Figure 5 is a sectional elevation of a further embodiment of the invention;

Figure 6 is an underneath plan thereof 1 Figure 7 is a plan view of the valve removed from the valve casing;

Figure 8 is a sectionalview of the valve seating removed from the casing, and

"Figure 9 is a plan thereof.

In the embodiment illustrated in Figures 1 to'3 the valve casing is'formed in two parts 1*and2 and the seating 3 for the main valve 4: is arranged at the top of an upwardly extending tubular part5 provided on the part the diameter of the part 5 being such that when the part 2 is attached thereto, an annular chamberfi is formed around the extension 5. The'valve 4 is provided on its periphery with aplurality of angularly disposed vanes 7 or othermeans for enabling the fluid passing through said valve to set up a rotative action of said valve. The valve seating 3 may be of the usual mushroom type as shown in Figure 1, or as shown in F igure 4, it maybe formed V-shaped or with an equivalent sharp edge and the underside of the valve plate26 may be formed flat as shown at 8 in Figure 4 so as to provide a. minimum of contact surface between the fixed and moving parts of'the valve. The valve 4 is furnished'on its underside with a centrally arranged stem 9 adapted to slide vertically and rotate in a sleeve 10, concentrically supported by webs 11 in (the part 1 of the casing. The stem 9 is bored to receive the stem 12 of a second valve 13 adapted'to'seat on a collar '14 secured in thepart 1 of the casing. The valve 13 is soarranged or formed that the fluid may leak past same slowly for the purpose hereafter referred to. The upper part 20f the valve casing isprovlded with a perforated part, bridge or stop 15 with which a projection 16 on the top of the valve 4 is adapted to contact so as to prevent the upper face of said valve 4 seatlng against the upper face of the valve casing, thereby retarding or preventing'the passage of the fluid. The possible lift of the main valve 4 is arranged to be greater than the lift of the valve 18 so that the latter valve will close before the main valve. Accordingt'o a modification the valve and .80 1ts seating may be formed substantially as shown in Figure 4, that is, the valve seating may have a V shaped or equivalent sharp edge adapted to coact with a flat surface on the valve. s5

According to a further embodiment ofthe invention illustrated in Figures 5to 9',"the valve seating 3a'is provided on a part1? formed separately from and having a sliding fit within the casing 18, which isi fur .90

nished with an annular knife edge 19 adapted to bear against the upper face 20 of the part1? which forms the bottom of the an nular chamber 6a, to make a fluid tight joint between the two parts, or ifdesired, the annular knife edge may be formed on the part 17 adapted to coact with a shoulder on the part 18. The part1? is maintained in position by means of the nut 21, the inner top surface 22 of which also forms a seating for the valve 13a secured to the lower end of the stem 12% V The main valve 4a is in this construction provided with but four vanes 7 a and its maximum elevation is limitedbyasplit ring 23, placed in a groove 24 formed at the lower end of the stem 9a, the lower part of the sleeve 10a concentrically supported by webs 11a being recessed as shown so as to provide a shoulder 25 for the ring to bear against.

The part 26a of the main valve 40!. adapted to coact with the valve seating 3w may be formed in one with said valve, but said coacting part is preferably formed separately therefrom in the form of a hard steel washer and soldered or otherwise secured thereto andv ground.

In operation, the fluidbeing delivered, first lifts the lower or second valve and then the main valve which immediately commences to rotate, but immediately pumping ceases the second valve drops onto its seat and prevents the immediate fall of the fluid in the pipe andalso by reason of the slight cushioning effect prevents the main valve falling too rapidly on its seat so as to enable the rotative movement of said valve to throw out any foreign matter that might otherwise come-between the valve face and its seating. Theleakage of fluid past the second valve provides the necessary suction on the underside of. the main valveso as to permit the pressure of, the fluid above said main valve to press same on its seating.

What I claim is o 1 A non-return valve for controlling the flowrof fluids, comprising in combination a casing, a valve seating therein, a valve co acting with said seating, a plurality of angularly disposed vanes on the periphery of the head of said valve, a part screwed into the lower end of the casingbelow the first named valve seating, a seating formed on the inner surface of said part, a light flat plate valve coacting with said seating, the two valves being so arranged that the light plate valve closes first and permits the fluid to leak slowly past, thereby for a short period maintaining fluid pressure below the first named valve for preventing the too rapid closure thereof.

2. ,A non-returnvalve for controlling the of fluids, comprising; in combination a casing formed in two parts, a, tubularpart provided on one of'said parts arranged to exposed vanes tend into the other of said parts and to form an annular chamber around said extension,

3. Anon-return valve forcontrolling the.

flow of fluids, comprising in combination an outer casing, an inner part having a sliding fit within said outer. casing;im'eans comprisinga nut for maintaining said inner part in position, a valve seating formed at the top of said inner part, a sleeve. supported in said part, a valve arranged above and coacting with said valve seating, a depending stem on said valve sliding in'said sleeve, angularly disposed vanes on the periphery of the head of said valve, a valve seating formed on the nut for maintaining the said inner part in position, and a light flat plate valve coacting with said seating. i v

.4. A non-return valve for controlling the flow of fluids, comprising in combination an outer casing, an inner part having a sliding fit within said outer casing,,means for mak ing a fluid. tight joint, betwee'nfsaid parts and means comprising anut for maintaining said inner part in position,ea valve seating formed with a sharp edge at the topv of said inner part, a concentricallydisposed sleeve supported in said part, a flat faced valve coacting with said valve seating, a stem on said valve sliding in. the concentrically disposed sleeve, a plurality of angularly "dison the periphery of the head of said valve, and means for limiting the lift of said valve, a second va'lvevseating located below the bottom of the stem on the flat faced valve formed on the nut for maintaining the said inner .part in. position, a plate valve coacting with said seating and a stem on said plate valve arranged toslide in the stem of the first named valve.

5. A non-return valve for'controllin g the r flow of fluids, comprising in' combination an outer casing, an inner part having a sliding fit within said outercasing, means comprising an annular knife edge on the-interior of the casing adapted to. coact with the upper face of the inner part for making-a fluidtight joint between said parts and means'com'p'rising a nut for maintaining sa'id-innerpart in 7 position, a. tubular extension provided on the top of said inner part, a valve seating formed with a sharp edge at the top of said extension, a concentrically disposed sleeve supportedin said inner part, aflatfaced valve coacting with said valve seating, of angularly disposedkvanesjon the-periphery of the head of said valve, a stem' on said a plurality I ito 

